In SEO, search volume is the number of times people look for a specific keyword or phrase each month. It’s key for marketers to know which topics are popular and worth targeting. High search volumes can mean more competition but also more traffic, while low-volume keywords might reach niche audiences with less rivalry. Tools like Google Keyword Planner help track these numbers and trends, allowing businesses to tailor their content to what users really want. Balancing high-volume terms with longer phrases can boost both visits and conversions effectively.